Give reason for the following: It is preferable to determine a change in enthalpy than change in internal energy.

Give reason for the following: Electron gain enthalpy of noble gas is almost zero.

Give reasons for the following observations. CH_3COOH is weaker than HCOOH

Assign reason for the following:- The negative Value of electron gain enthalpy of fluorine is less than that of CI.

Give the reason for the following: The first ionisation enthalpy of oxygen is smaller compared to nitrogen.

Which of the following statement is incorrect about internal energy? a) The absolute value of internal energy cannot be determined b) The internal energy of one mole of a substance is same at any temperature or pressure c) The measurement of heat change during a reaction by bomb calorimeter is equal to the internal energy change d) Internal energy is an extensive property

Internal energy U of a system may change when

What is meant by a change in Gibbs energy of a system?